Chuck



H. E. SLOAN ET AL April 4, 1933.

June 27 1950 Reissued Apr. 4, 1933 UNITED STATES PATENT OFFICE HARRY E.SLOAN, OF HARTFORD, AND GEORGE A.. HIGHBERG, 0F WEST HARTFORD,

CONNECTICUT, ASSIGNORS T0 THE CUSHMAN CHUCK COMPANY, OF HARTFORD, CON- NECTICUT, A. CORPORATION 0F CONNECTICUT CHUCK Original No.. 1,844,445,dated February 9, 1932, Serial No. 464,241, Ied June 27, 1930.Application for reissue led July 13, 1932. SeraI No. 622,280.

Our invention relates to mechanism for opening and closing the chuckjaws or other devices for holding work for various purposes, as for theperformance of operations thereon, and an object of our invention, amongothers, is to provide operating means of this type that shall be simplein construction and particularly efficient in operation.

One form of a chuck embodying our invention and in the construction anduse of which the objects herein set out, as well as others, may beattained, is illustrated in the accompanying drawing, in which- Figure 1is a view in side elevation of a portion of a chuck and of our improveddriving mechanism connected therewith, the center portions of the chuckdriving mechanism being broken out, and parts being broken away insection to show construction.

Figure 2 is a view in section on a plane denoted by the dotted line 2-2of Figure 1, the scale of this ligure being enlarged.

Figure 3 is an isometric view of a fragment of the actuating collar anda chuck jaw associated therewith', and illustrating the mounting of thebars connecting said members with the actuating lever.

In the accompanying drawing the numeral 3 denotes supports for the chuckdriving mechanism, which supports may be ofany usual and ordinaryconstruction and which comprise bearings for a chuck driving shaft 4which is tubular and to which driving members, as pulleys (not shown)may be secured in av manner common to structures of this class. A chuckor other work hold- Aing body is secured to the front end of the shaft4, the particular type of structure herein shown being in the form of achuck comprising a body 5 formed with radial grooves 6 for therecept-ion of the bases' 7 of chuck jaws 8, which aws are secured to thebases as by means of screws. An opening extending inwardly at the centerof the body 5 may be closed by a plate 9 having a stem 10 proj ectinginwardly therefrom, said stem forming a bearing for one end of anactuating collar 11 slidably mounted in the body, said collar havinggrooves 12, there being one of these grooves appurtenant to each chuckjaw, and each groove having an actuating bar 13 extending thereacross,each bar being engaged in a notch in the end of a jaw actuating lever 14pivotally mounted in a recess 15 in the body 5. The upper edge of eachlever has a notch to receive a bar 16y projecting across a groove 17formed in the under side of a base 7 of a chuck jaw.

From this construction it will be seen that a lengthwise movement of theactuating collar 11 Ywill impart a radial movement to the chuck jaws,and our improved mechanism illustrated and described herein is employedfor imparting this movement to said collar. A sleeve 18 is screwthreadedly engaged with the collar 11 and an actuating spindle 19projects through the shaft 4 into a chamber in a housing for theactuating mechanism, this housing comprising two sections 20-21chambered to receive the actuating members. Said spindle 19 is screwthreadedly engaged within the hole in the sleeve 18.

A cap 22 secured to the section 20 closes the chamber at one end and theopposite end of said chamber is closed by the base of a motor 23. Theshaft 24 of the motor has a pinion 25 meshing with a gear 26 secured toa spindle 27 vrotatably mounted in the sections 20-21 of the housing,said spindle having a pinion 28 secured thereto and meshing with aperipheral row of teeth- 29 formed on a ring 30. This ring is rotatablymounted within the chamber in the housing.

A tooth 32 is formed on the inner side of the ring 30, said toothoperating against a tooth 33 projecting from the outer side of a spindleactuating sleeve 34 rotatably supported by ball bearing members 31arranged in any suitable manner.l Said sleeve is internally screwthreaded, which screw thread `meshes with a thread 35 on the spindle 19.

It will be noted that the train of gearing connecting the motor 'shaft24 with the spindle actuating sleeve 34 is such as to reduce the speedof the motor to limits suitable for actuation of the spindle 19.

In order to enable the motor to acquire proper speed for eicientoperation of the mechanism we provide the vteeth 32-33 as a shown in theiigures, the jaws 8 are closedr and ready to be moved radially outward.V

The motor being' started the tooth 32 is moved away from the tooth 33making nearly a complete rotation when it comes in contact with thetooth 33 on the opposite side from that shown in Figure 2. vThis impartsa blow vto the tooth 33 and the sleeve 34 thereby imparting eXtra lforceto the jaws to open them should they have .a tendency to cling to thework.

During this movement of the tooth 32 from the position shown and toengage thev tooth 33 on the opposite side rfrom that shown inFigure 2,the motor has opportunity to gain its full speed and before anysubstantial resistance is interposed to its movement.

While a chuck with radially moving jaws Y has been selected by us forthe purposefof disclosing our invention herein, it will be understoodthatl the invention may be embodied in other structures for holdingarticles or devices for operations thereon without-*departure Vfrom thespirit or intent of the invention.

In accordance with the provisions of the patent statutes we havedescribed the'principles of operation of our invention together with thedevice which we now consider to represent thebest embodiment thereof;but we desire to have it understood that the device shown is onlyillustrative and that the invention may be carried out by other meansand applied to uses other than those above set out. l

We'claim: y

1. An actuating mechanism for Awork holding members, said mechanismincluding a rotating driving shaft, a working holding body secured toone end of said shaft,` a motor secured to the opposite end of saidshaft, a holding member movably mounted on said body, an actuatingspindle projecting through said shaft and operatively connected withsaid member to operate it,.a rotatably mounted operating member forpositively imparting. lreciprocating movement to said spindle inopposite directions, means for positively preventing I longitudinalmovement of said operating member in opposite directions, a connectionbetween said spindle and operating member to effect longitudinalreciprocating movement of the latter, and an operative connectionbetween said operating member and said motor for operation of saidoperating-member. l j.

2.V An actuating mechanism for. work holding members, said mechanismincluding a rotating driving shaft, a work holding body secured to oneend of said shaft, a motor secured to the opposite'end of said shaft, aholding member. movably mounted on said body, an actuating spindleprojecting through said shaft and operatively connected with said memberto operate it, said spindle having a screw threaded end, an operatingmember rotatably mounted and engaged with the screw threaded end of saidspindle, means for positively preventing longitudinal movement of saidoperating member in opposite directions, and an operativeconnectionbetween said operating member and said motor for rotating saidoperating member.

3. An actuating mechanism for work holding members, said mechanismincluding a rotating driving shaft, a work holding body secured to oneend of said shaft, a housing for operating mechanism secured totheopposite end of the shaft, a motor secured to said housing, a holdingmember mounted on said body, anactuatingspindle projecting through saidshaft and operatively connected i Y with said holding member to operateit, said spindle, having a screw` threaded end, an operating memberrotatably mounted in said housing and `engaged withthe screw threadedVend of said spindle, means for positively preventing longitudinalmovement of said voperating member in oppositedirections, and anoperative connection between said operating member and motor forrotation of said operating member.

4. An actuating mechanism for work holding members, said` mechanismincluding a reciprocating member, a work holding body having a holdingmember movable thereon,

an operative connection between said holding member and 'reciprocatingmember for operation of the holding member, a motor including a rotatingdriving member, an operative connection between said motor andreciprocating vmember including means for translating the rotation ofsaid driving member into reciprocating movement ofsaid reciprocatingmember, and means for positively preventing longitudinal movement ofsaid translating means in opposite directions.

l 5. An actuating mechanism for work holding memberssaid mechanismincluding a reciprocating member having a screw threaded end, a workholding body having a holding member movable thereon, an operativeconnection between said holding member and reciprocating member foroperation of the former, an actuating member rotatably mounted andengaged with the screw threaded end of said reciprocating member, meansfor positively preventing longitudinal movement of said actuating memberin opposite directions, a motor, and an operative connection betweensaid motor and said actuating member to rotate the latter.

6. An actuating mechanism including an actuating spindle, mechanismconnected with said spindle to be actuated thereby, said spindle havinga screw threaded part, an operating member rotatably mounted and engagedwith said screw threaded part of said spindle, means for positivelypreventing longitudinal movement of said operating member in oppositedirections, a motor, and an operative connection between said operatingmember and motor for rotating said member.

7. An actuating mechanism including a rotating shaft, an actuatingspindle projecting through said shaft, mechanism connected with saidspindle to be actuated thereby, said spindle having a screw threadedpart, an operating member rotatably mounted and engaged with the screwthreaded part of said spindle, means for positively preventinglongitudinal movement of said operating member in opposite directions, amotor, and an operative connection between said operating member andmotor for rotating said operating member.

8. An actuating mechanism including a supporting housing, an actuatingspindle projecting into said housing, mechanism connected with saidspindle to be actuated thereby, said spindle having a screw threadedpart, an operating member rotatably mounted and engaged with the screwthreaded part of said spindle, means for positively preventinglongitudinal movement of said operating member in opposite directions, amotor mounted on said housing, and an operative connection between saidoperating member and motor for rotating said operating member.

9. An actuating mechanism including a supporting housing, an actuatingspindle having one end projected into said housing, mechanism connectedwith said spindle to be actuated thereby, said spindle having a screwthreaded end, an operating `member ro` tatably mounted in said housingand engaged with the screw threaded end of said spindle therein. meansfor positively preventing longitudinal movement of said operating memberin opposite directions, a motor mounted on said housing, and anoperative connection between said operating member nd motor for rotatingsaid operating mem- 10. An actuating mechanism including a supportinghousing, a rotating shaft, an actuating spindle projecting through saidshaft, mechanism supported by said shaft and connected with said spindleto be actuated thereby, said spindle having a screw threaded end, anoperating member rotatably mounted in said housing and engaged with thescrew threaded end of said spindle, means for positively preventinglongitudinal movement of said operating member in opposite directions, amotor mounted on said housing,

and an operative connection between said operating member and motor forrotating said operating member.

HARRY E. SLOAN. GEORGE A. HIGHBERG.

